Carburetor

ABSTRACT

A carburetor provided with an air fuel mixing compartment into which the flow of fuel and air are controlled simultaneously. The air flow drives an impeller arrangement in the compartment which agitates the mixture. The air fuel mixture is then drawn out of this compartment by suction into the engine intake manifold through a flow control baffle.

[ CARBURETOR [76] Inventor: Clifford T. Carnes, 731 McCray,

l-lollister, Calif. 95023 [22] Filed: Nov. 19, 1970 21 Appl. No.: 91,080

[52] US. Cl 261/50 R, 261/52, 261/89 [51] Int. Cl. F02m 29/02 [58] Field of Search 261/89, 90, 84, 52, 59,

[56] References Cited UNITED STATES PATENTS 575,049 1/1897 Bernd, Jr. 261/89- 1,340,956 5/1920 Hukle 261/89 1,730,410 10/1929 Dennison 261/89 1,746,439 2/1930 Murrer 261/89 111. 3,822,868 1 July 9,1974

Snyder 261/89 2,314,170 3/1943 2,932,495 4/1960 3,164,451 l/1965 3,192,167 6/1965 3,439,903 4/1969 Tolnai 261/89 Primary Examiner'Tim R. Miles Attorney, Agent, or FirmA11en & Chromy [5 7] ABSTRACT A carburetor provided with an air fuel mixing compartment into which the flow of fuel and air are controlled simultaneously. The air flow drives an impeller arrangement in the compartment which agitates the mixture. The air fuel mixture is then drawn out of this compartment by suction into the engine intake manifold through a flow control baffle.

3 Claims, 12 Drawing Figures PMENTEDJUL 91914.

SHEU 1 [IF 2 INVENTOR. CLIFFORD T. CARNES ATTOR EYS wwa ,3lb 3m @"Blo l CARBURETQR DESCRIPTION OF THE INVENTION This invention relates to a carburetor for use on internal combustion engines.

An object of this invention is to provide an improved carburetor with means for controlling the flow of both the air and fuel to provide a combustible mixture which is thoroughly mixed before it is fed into the internal combustion engine.

Another object of this invention is to provide an improved carburetor for mixing the combustible mixture of air and fuel, said carburetor being provided with an air driven impeller which is driven by air being supplied to the mixture.

Still another object of this invention is to provide an improved carburetor in which both the flow of fuel and flow of air to the combustible fuel mixing chamber are controlled simultaneously to provide a predetermined air fuel mixture to the internal combustion engine under all load conditions.

Other and further objects of this invention will be apparent to those skilled in the art to which it relates from the following specification, claims and drawing, in which, briefly:

FIG. I is a side view partially broken away of an embodiment of this invention;

FIG. 2 is a view taken along the line 2-2 of FIG. 1 showing the top of the device;

FIG. 3 is a sectional view taken along the line 3-3 of FIG. 1;

FIG. 4 is a sectional view taken along the line 4-4 of FIG. I; 1

FIG. 5 is a sectional view taken along the line 5-5 of FIG.. 1;

FIG. 6 is a view of one of the impellers used for mixing the fuel air mixture;

FIG. 7 is a front view of the air driven rotor which drives the impeller shown in FIG. 6;

FIG. 8 is a top view of the fuel-receiving compartment taken along the line 8-8 of FIG. 9;

FIG. 9 is a vertical sectional view of the fuelreceiving compartment;

FIG. 10 is a sectional view taken along the line 10-I0 of FIG. 1;

FIG. 11 is a sectional view taken along the line 1ll1 of FIG. 1; and

FIG. 12 is a sectional view taken along the line 12-l2 of FIG. 1.

Referring to the drawing in detail, reference numeral 10 designates the carburetor housing which may be made of metal, plastic, or the like, and which is provided with a top 11 and a bottom 12 fixedly attached to the side walls thereof. A rotatable member13 is positioned over the top 11 and a fueLreceiving compartment 14 is attached to the underside thereof by screws 15 as shown in FIG. 9. A cover 13a is provided to the compartment and a fitting 16 which is connected to the fuel line is threaded into a hole in this cover. The lower part of the fuel-receiving compartment 14 is positioned in the cup-shaped member 17 and an O-ring 18 is provided on the inner surface of the member 17 to provide a seal between the outer wall of the compartment 14 and the inner wall of the member 17 as shown in FIG. 9.

The bottom of the compartment 14 is provided with holes 19 as shown in FIG. 8 so that fuel flows through these holes into the cup-shaped member 17. The holes 19 are also shown in FIG. 4 and the nut 20 of the bolt 21 which is located in compartment 14 is also shown in this figure. The bolt 21 extends into compartment 14 and through a hole in the bottom of member 17 and it is keyed to the bottom of the compartment 14 so that it is rotatable therewith. An O-ring 17a is lodged in a recess in the bottom of member 17 and it is positioned around the bolt 21 to form a seal and prevent fuel from leaking around bolt 21 out of member 17.

The bottom part of the bolt 21 is provided with a nut 22 which is located just below the apertured'plate 23 as shown in FIG. 1. Plate 23 is keyed to the bolt 21 and is also rotatable therewith. A lever 24 is attached to the member 13 by the bolts 25 so that this member, compartment 14, bolt 21 and apertured plate 23 may be rotated by this lever. The member 13 is provided with apertures 26 as shown in FIG. 2, and these apertures are adapted to be aligned with the apertures 27 which are provided to the housing top 11 as shown in FIG. 3. Air is admitted into the upper part of the housing 10 through the holes 26 and 27 when these holes are moved into alignment by moving the lever 24 and member 13.

The housing 10 is provided with an apertured partition 28 in the lower part thereof as shown in FIG. 1 and this partition is provided with a plurality of holes 29 as shown in FIG. '10. The rotatable plate 23 is positioned below the partition 28 and this plate is provided with a plurality of holes 30 which are adapted to be moved into alignment with the holes 29 when the plate 23 is rotated by lever 24 and bolt 21.

The housing 10 is also provided with wall structure 31 which consists of four inclined panels extending from the bottom of the cup-shaped member 17 to the sidewalls of the housing 10 as shown in FIG. 1. The sides of the walls 31 abut as shown in FIG. 4 and they are held together by suitable screws (not shown). The bottom of this compartment is open and rests on the supports 31b that are attached to side walls of the housing. Screws 31a are provided in the sidewalls of the housing and they engage selected sides 31 and press them against supports 31b. The panels 31 are provided with air apertures 32a and 32 such as shown in FIGS. 4, 6 and 7. A pair of air driven propellers 33 are attached to shafts such as shaft 34 and these shafts are supported on opposite panels 31 by the bearings such as bearing 35 as shown in FIG. 6. The shafts 34 extend into the air and fuel mixing compartment formed by the wall structure 31.

Impellers 36 are attached to the inner ends of shafts 34 on the inside of the mixing compartment. The fuel passage 37 is bored through the member 31 into the upper one of the air passages 32 as shown in FIG. 6 and fuel flow through the bore 37 is controlled by the needle valve 38 which is attached to the leaf spring 39. Two such needle valves are provided in the cup member 17 so that fuel is fed to the compartment just above each of the impellers 36. Springs 39 supporting these needle valves are attached to the bottom of the cup member 17 by screws 40 as shown in FIG. 5.

The bottom of the compartment 14 is provided with inclined cam members 41 which are shown in FIG. 9, and these cam members engage the springs 39 to control the needle valves 38 and thus control the fuel flow into the passage 37. The needle valves 38 are thus con trolled when the lever 24 rotates the member 13 which in turn rotates the compartment 14, and the cams 41. Rotation of the member 13 also controls the alignment of holes 26 which are provided to the member 13 with the holes 27 provided to the housing top 11. The plate 23 is also rotated by the lever 24 since this plate is attached to the bottom part of the rod 21 and the holes 30 through this plate are brought into alignment at the same time as the holes 26 of member 13 are brought into alignment with holes 27 of the top 1 l. The bottom 12 of this device is connected to the intake manifold of the internal combustion engine (not shown) and the air fuel mixture is drawn into the intake manifold through holes 12a provided in the bottom 12. The volume of the air fuel mixture supplied to the engine is controlled by the lever 24. When it is desired to accelerate or increase the RPM of the engine the operator shifts the lever 24 to increase the air flow through the holes 26 and 27 into the top of the housing 10. At the same time the cams 41 on the bottom of member 14 are turned to allow springs 39 to raise the needle valves 38 so that fuel flows through passages 37 and mixes with air flowing through holes 32. The air and fuel impinges the impellers 36 driven by the rotors 33. Rotors 33 are positioned on the outside of holes 32 and air impinges the blades of the rotors before entering these holes thereby causing the rotors 33 to rotate and turn the impellers 36 to agitate the air fuel mixture.

While I have shown and described a preferred form of the invention it will be apparent that the invention is capable of variation and modification from the form shown so that the scope thereof should be limited only by the scope of the claims appended hereto.

What I claim is:

1. In a carburetor for use on internal combustion engines the combination comprising a housing, said housing having a fuel-receiving compartment, adjustable means for admitting air into said housing, said housing having an additional compartment in which the air and fuel are mixed, adjustable means admitting fuel from said fuel-receiving compartment into said additional compartment, said additional compartment having wall structure with apertures through which air is admitted thereto, selected ones of said apertures receiving fuel through said adjustable fuel feeding means, impeller means positioned adjacent to said selected apertures, means driving said, impeller means, the fuel fed to said selected apertures being driven against said impeller means by air entering said additional compartment through said selected apertures so that the fuel and ai. are thoroughly mixed by the action of said impeller means in said additional compartment, means feeding the air fuel mixture to the intake manifold of an engine, said means admitting air into said housing comprising a cover for said housing. having a plurality of holes therethrough arranged in a predetermined pattern and a rotatable member positioned over said cover, said rotatable member having a plurality of holes that are adapted to be brought into alignment with said holes through said cover to control flow of air into said housing, said fuel admitting means comprising adjustable valves in said fuel-receiving compartment, said fuelreceiving compartment comprising a lower part and an upper part partially nesting in said lower part, said upper part being rotatable with said rotatable member, said upper part having cams on the bottom thereof adjusting said valves when said upper part is rotated.

2. In a carburetor for use on internal combustion engines the combination as set forth in claim 1, further characterized in that said additional compartment is provided with a bottom having a plurality of holes therethrough, a second rotatable member having a plurality of holes therethrough, means rotating said second rotatable member when said first mentioned rotatable member is rotated so that said holes through said second rotatable member are brought into alignment with said holes in said bottom simultaneously as said holes in said first mentioned rotatable member are brought into alignment with said holes in said cover.

3. In a carburetor for use on internal combustion engines the combination as set forth in claim 2, further characterized in that said means rotating said second rotatable member comprises a shaft fixedly attached to said second rotatable member and to said upper part of said fuel receiving compartment. 

1. In a carburetor for use on internal combustion engines the combination comprising a housing, said housing having a fuelreceiving compartment, adjustable means for admitting air into said housing, said housing having an additional compartment in which the air and fuel are mixed, adjustable means admitting fuel from said fuel-receiving compartment into said additional compartment, said additional compartment having wall structure with apertures through which air is admitted thereto, selected ones of said apertures receiving fuel through said adjustable fuel feeding means, impeller means positioned adjacent to said selected apertures, means driving said impeller means, the fuel fed to said selected apertures being driven against said impeller means by air entering said additional compartment through said selected apertures so that the fuel and air are thoroughly mixed by the action of said impeller means in said additional compartment, means feeding the air fuel mixture to the intake manifold of an engine, said means admitting air into said housing comprising a cover for said housing having a plurality of holes therethrough arranged in a predetermined pattern and a rotatable member positioned over said cover, said rotatable member having a plurality of holes that are adapted to be brought into alignment with said holes through said cover to control flow of air into said housing, said fuel admitting means comprising adjustable valves in said fuel-receiving compartment, said fuel-receiving compartment comprising a lower part and an upper part partially nesting in said lower part, said upper part being rotatable with said rotatable member, said upper part having cams on the bottom thereof adjusting said valves when said upper part is rotated.
 2. In a carburetor for use on internal combustion engines the combination as set forth in claim 1, further characterized in that said additional compartment is provided with a bottom having a plurality of holes therethrough, a second rotatable member having a plurality of holes therethrough, means rotating said second rotatable member when said first mentioned rotatable member is rotated so that said holes through said second rotatable member are brought into alignment with said holes in said bottom simultaneously as said holes in said first mentioned rotatable member are brought into alignment with said holes in said cover.
 3. In a carburetor for use on internal combustion engines the combination as set forth in claim 2, further characterized in that said means rotating said second rotatable member comprises a shaft fixedly attached to said second rotatable member and to said upper part of said fuel receiving compartment. 